CN103510639A - Overlapped plate type shear wall with restorability and constructing method thereof - Google Patents
Overlapped plate type shear wall with restorability and constructing method thereof Download PDFInfo
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Abstract
The invention discloses an overlapped plate type shear wall with the restorability and a constructing method of the shear wall. The shear wall comprises an overlapped wallboard, unbonded prestressed reinforcing steel and a half-assembly overlapped plate type reinforced concrete shear wall body which is composed of outer steel plates at the positions of horizontal splicing seams. The prefabricated part of the overlapped plate type shear wall is composed of two layers of prefabricated plates and lattice steel bars having the connecting effect, after prefabricated components are installed in place on site, necessary connecting steel bars and necessary stressed steel bars are arranged, and concreting is performed at the core position of a prefabricated wallboard to form an overlapped stressed structure. According to the overlapped plate type shear wall, the post-tensioning unbonded prestressed reinforcing steel is arranged at the core cats-in-place position of the overlapped plate type shear wall, elasticity of the unbonded prestressed reinforcing steel can be kept under the condition of a rare-occurrence earthquake, and therefore residual deformation of the shear wall is small after the earthquake, the shear wall has the self reset function, and the shear wall is convenient to repair after the earthquake; the outer steel plates easy to replace after the earthquake are adopted at the positions of the horizontal splicing seams of the overlapped plate type shear wall, the steel plates bend under the condition of the rare-occurrence earthquake, energy of the earthquake is dispersed, the shear wall is convenient to replace after the earthquake, and the restorability of the shear wall is improved further.
Description
Technical field
The invention belongs to the technical field of Structural Engineering, relate in particular to a kind of superimposed board-like shear wall and implementation method thereof that can restore funcitons.
Background technology
The structure that this patent relates to be a kind of take that superimposed wallboard and laminated floor slab be main bearing member partly assemble superimposed board-like reinforced concrete shear wall structure.Wherein, precast concrete panel connects two-layer precast plate by lattice reinforcing bar and forms, and is also provided with lattice reinforcing bar in precast floor slab.Lattice reinforcing bar You Sangen cross section is the upper lower edge reinforcing bar of isosceles triangle and the oblique abdomen muscle of bending forming forms, its effect is mainly to strengthen pre-erection and cast-in-situ concrete being connected and globality partly, and guarantees that prefabricated units have enough strength and stiffness in transporting and hoisting process.After the on-the-spot installation in position of prefabricated units, necessary connecting reinforcement and steel bar stress are set, at core position, the surface layer of precast floor slab and the position concretings such as edge member of shear wall of prefabricated panel, thereby form superposed type force structure.Partly assemble superimposed board-like shear wall structure and absorbed the advantage of cast-in-place concrete structure and precast concrete, compare with traditional full fabricated shear wall structure, overall performance is better, can allow a small amount of alignment error, requirement to on-the-spot installation accuracy is lower, is therefore a kind of architectural structure system that is applicable to the current national conditions of China.
Partly assemble the category that superimposed board-like shear wall structure and prefabricated large panel structure all belong to traditional " imitative cast-in-place " structure, its purpose of design be take stress performance and is reached cast-in-place structural as target.Identical with monolithic reinforced concrete structure, although this class formation has good ductility and energy dissipation capacity, under macroseism, often produce larger plastic strain and the rear permanent set of shake, structure repair difficulty, brings larger economic loss to owner.Under the guidance based on performance-based seismic design thought, should more pay close attention to recovery capability after the shake of structure, make structure after earthquake, not need to repair or repair a little can recover it and use function, thereby reach the object that reduces economic loss.
Summary of the invention
The object of the invention is in order to make up the deficiency of prior art, a kind of superimposed board-like shear wall and implementation method thereof that can restore funcitons be provided, to reduce permanent set after the shake of structure under rarely occurred earthquake effect, and improve the function of structure can recovery capability.
The present invention is achieved through the following technical solutions:
A kind of superimposed board-like shear wall that can restore funcitons, it is characterized in that: include the external steel plate of the superimposed board-like shear wall of half assembling and unbonded prestressing tendon and horizontal edge joint position and form, the described superposed type primary structure member that partly assembles superimposed board-like shear wall Wei You both sides prefabricated panel and core cast-in-situ concrete formation; The cast-in-place position of described core of partly assembling superimposed board-like reinforced concrete shear wall arranges the unbonded prestressing tendon through horizontal piece between wallboard and basis and between levels wallboard, and unbonded prestressing tendon is positioned near the position natural axis of cross section; Described place, two ends of partly assembling the horizontal piece that may occur plastic strain in superimposed board-like reinforced concrete shear wall under rarely occurred earthquake is fixed with external junction steel plate by high-strength bolt, and external junction steel plate carries out weld all around with the pre-embedded steel slab partly assembling in superimposed board-like reinforced concrete shear wall; Described partly assemble in superimposed board-like reinforced concrete shear wall, under rarely occurred earthquake, there is not plastic strain each floor without the unbonded prestressing tendon arranging through horizontal piece between wallboard, horizontal edge joint position, also without external steel plate is set, adopts vertical plain bars to connect.
Described unbonded prestressing tendon is arranged on the core position of superimposed board-like shear wall, can be first fixing presstressed reinforcing steel position, build again core space concrete, after concrete reaches some strength, carry out the stretch-draw of presstressed reinforcing steel, without keeping somewhere in advance presstressed reinforcing steel bellows.
Within the scope of near the described certain altitude partly assembling the horizontal piece that may occur plastic strain in superimposed board-like reinforced concrete shear wall under rarely occurred earthquake, the lattice reinforcing bar of encryption is set in the constrained edge member of shear wall, forms confined concrete.
The job practices of described superimposed board-like shear wall that can restore funcitons, is characterized in that: specifically include following steps:
First cast in situ concrete foundation and cast-in-place concrete wall section are together built, pre-embedded steel slab in cast-in-place wall section, default high-strength bolt hole, and the anchored end of unbonded prestressing tendon is imbedded to cast-in-place wall end;
By being embedded with the prefabricated position of the superimposed board-like shear wall hoisted in position of pre-embedded steel slab, be placed on spacer pad, adjust verticality and the position of wallboard;
Unbonded prestressing tendon is passed to wallboard core space, and fix its position, build core space concrete; External junction steel plate is installed, with three weld all arounds of steel embedded board, fastening by high-strength bolt;
Adopting uses the same method carries out the construction of upper floor, and unbonded prestressing tendon, through core space, is strengthened to district's floor levels edge joint position in structural base and all adopted external junction steel plate to be connected with high-strength bolt;
Continue the wallboard that a floor above district is strengthened in construction bottom, unbonded prestressing tendon, through core space, is built to core space concrete; After concrete reaches some strength, tensioned prestressing bar;
After this construction of each floor is identical with common superimposed sheet shear wall, does not need to arrange unbonded prestressing tendon, and horizontal edge joint position, also without external steel plate is set, adopts vertical plain bars to connect.
This shear wall arranges posttension unbonded prestressing tendon at the cast-in-place position of core, both can provide part anti-bending bearing capacity, is conducive to again the Self-resetting after shear wall rarely occurred earthquake, is convenient to shake rear reparation; The horizontal piece of superimposed board-like shear wall position is adopted to the external steel plate replacement plain bars that is easy to shake rear replacing, further improve the rear recovery capability of its shake.Posttension unbonded prestressing tendon should be arranged near the natural axis of cross section, makes structure presstressed reinforcing steel when occurring compared with large plastometric set still can keep elasticity, thereby the self-resetting capability of shear wall is provided.Core position at superimposed board-like shear wall arranges posttension unbonded prestressing tendon, can be first fixing presstressed reinforcing steel position, then build core space concrete, after concrete reaches some strength, carry out the stretch-draw of presstressed reinforcing steel, without keeping somewhere in advance presstressed reinforcing steel bellows, construct more convenient.
The horizontal edge joint position that may occur plastic strain at shear wall, adopts external steel plate to replace the vertical vertical muscle through piece.There is plastic strain in this steel plate, dissipation seismic energy is convenient to after shake remove and is changed under rarely occurred earthquake effect.Steel plate is connected by high-strength bolt with superimposed wallboard, and with prefabricated panel in pre-embedded steel slab carry out weld all around.For ease of burying underground of pre-embedded steel slab, in bottom, need to arrange certain altitude cast-in-place wall section, build with basis simultaneously.
Due to posttension unbonded prestressing tendon in superimposed board-like shear wall structure not as assembled means, therefore can be only within the bottom floor (be generally shear wall bottom and strengthen district) of plastic strain may appear in structure, presstressed reinforcing steel be set.Under the rarely occurred earthquake of top, can there is not the horizontal edge joint position of plastic strain without adopting external steel plate to connect yet, still adopt common splicing structure mode.
The plastic strain under rarely occurred earthquake effect of this structure mainly occurs near horizontal piece, and plastic range is more concentrated, and shear wall end capacity compression district concrete bears compared with huge pressing stress.Therefore, within the scope of near certain altitude horizontal piece, the lattice reinforcing bar of encryption is set in the constrained edge member of shear wall, forms confined concrete, to improve its intensity and deformability, prevent too early crushing.
Advantage of the present invention is:
Reasonable in design of the present invention, arranges posttension unbonded prestressing tendon at the cast-in-place position of core, makes structure have the rear Self-resetting function of shake, is convenient to shake rear reparation.The horizontal piece of superimposed board-like shear wall position is adopted to the external steel plate replacement plain bars that is easy to shake rear replacing, further improve the rear recovery capability of its shake.This method greatly improves superimposed board-like shear wall structure distortion recovery capability, under the prerequisite that suitably increases construction costs, integrality performance of the structure is effectively promoted.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing and specific implementation process, the invention will be further described:
A superimposed board-like shear wall for restore funcitons, this shear wall will partly assemble composite technology and post-tensioned prestressing prefabricating technique combines, form have can restore funcitons superimposed board-like shear wall.The cast-in-place part 12 of core at superimposed sheet shear wall arranges posttension unbonded prestressing tendon 4, without reserving hole channel in prefabricated panel, the advantage with easy construction, because presstressed reinforcing steel is without bonding, while producing moderate finite deformation, still can keep elasticity, therefore structure recovery ability is good, and after shake, permanent set is little.Described place, two ends of partly assembling the horizontal piece 9 that may occur plastic strain in superimposed board-like reinforced concrete shear wall under rarely occurred earthquake is fixed with external junction steel plate 5 by high-strength bolt, and external junction steel plate carries out weld all around with the pre-embedded steel slab 6 partly assembling in superimposed board-like reinforced concrete shear wall, , described partly assemble in superimposed board-like reinforced concrete shear wall, under rarely occurred earthquake, there is not plastic strain more than 10 each floor of horizontal piece without unbonded prestressing tendon is set, horizontal edge joint position is also without external steel plate is set, adopt vertical plain bars to connect.
Within the scope of near the described certain altitude partly assembling the horizontal piece 9 that may occur plastic strain in superimposed board-like reinforced concrete shear wall under rarely occurred earthquake, at the interior lattice reinforcing bar 13 that encryption is set of constrained edge member 14 of shear wall, form confined concrete.
Therefore in the present invention, post-tensioned prestressing muscle, not as assembled means in superimposed sheet shear wall structure, can be only arranges presstressed reinforcing steel within the bottom floor of plastic strain may appear in structure, and upper floor still adopts common splicing structure mode.This method greatly improves superimposed board-like shear wall structure distortion recovery capability, and under the prerequisite that suitably increases construction costs, integrality performance of the structure is effectively promoted.
For further strengthening recovery capability after the shake of structure, the present invention adopts the external steel plate 13 changed after being easy to shake to replace through horizontal piece common longitudinal reinforcement 3 at the horizontal piece of superimposed board-like shear wall position.External steel plate is surrendered power consumption under rarely occurred earthquake, and damage concentration is on steel plate, and the self-resetting capability by presstressed reinforcing steel after shake makes the basic recovery of structure level distortion, then, by changing impaired Wasted-energy steel plate, recovers rapidly the function of structure.
Specific implementation process is described below:
First cast in situ concrete foundation 1 and cast-in-place concrete wall section 2 are together built, in cast-in-place wall section, pre-embedded steel slab 6, default high-strength bolt hole 8, and the anchored end of unbonded prestressing tendon 4 is imbedded to cast-in-place wall section;
Superimposed board-like shear wall pre-erection 11 hoisted in position by pre-embedded steel slab 6, are placed on spacer pad, adjust verticality and the position of wallboard;
Unbonded prestressing tendon is passed to wallboard core space, and fix its position, build core space concrete; Steel plate 5 is installed, with 6 three weld all arounds of pre-embedded steel slab, high-strength bolt 7 is fastening;
Adopting uses the same method carries out the construction of upper floor, and unbonded prestressing tendon, through core space, is strengthened to district's floor levels edge joint position in structural base and all adopted external steel plate to be connected with high-strength bolt;
Continue the wallboard that a floor above district is strengthened in construction bottom, unbonded prestressing tendon, through core space, is built to core space concrete; After concrete reaches some strength, tensioned prestressing bar;
After this construction of each floor is identical with common superimposed sheet shear wall, does not need to arrange unbonded prestressing tendon, and horizontal edge joint position, also without external steel plate is set, adopts vertical plain bars to connect.
Claims (4)
- One kind can restore funcitons superimposed board-like shear wall, it is characterized in that: include the external steel plate of the superimposed board-like shear wall of half assembling and unbonded prestressing tendon and horizontal edge joint position and form, the described superposed type primary structure member that partly assembles superimposed board-like shear wall Wei You both sides prefabricated panel and core cast-in-situ concrete formation; The cast-in-place position of described core of partly assembling superimposed board-like reinforced concrete shear wall arranges the unbonded prestressing tendon through horizontal piece between wallboard and basis and between levels wallboard, and unbonded prestressing tendon is positioned near the position natural axis of cross section; Described place, two ends of partly assembling the horizontal piece that may occur plastic strain in superimposed board-like reinforced concrete shear wall under rarely occurred earthquake is fixed with external junction steel plate by high-strength bolt, and external junction steel plate carries out weld all around with the pre-embedded steel slab partly assembling in superimposed board-like reinforced concrete shear wall; Described partly assemble in superimposed board-like reinforced concrete shear wall, under rarely occurred earthquake, there is not plastic strain each floor without the unbonded prestressing tendon arranging through horizontal piece between wallboard, horizontal edge joint position, also without external steel plate is set, adopts vertical plain bars to connect.
- 2. superimposed board-like shear wall that can restore funcitons according to claim 1, it is characterized in that: described unbonded prestressing tendon is arranged on the cast-in-place position of core of superimposed board-like shear wall, can be first fixing presstressed reinforcing steel position, build again core space concrete, after reaching some strength, concrete carries out the stretch-draw of presstressed reinforcing steel, without keeping somewhere in advance presstressed reinforcing steel bellows.
- 3. superimposed board-like shear wall that can restore funcitons according to claim 1, it is characterized in that: described partly assembling may occur under rarely occurred earthquake in superimposed board-like reinforced concrete shear wall within the scope of near the certain altitude of the horizontal piece of plastic strain, the lattice reinforcing bar of encryption is set in the constrained edge member of shear wall, forms confined concrete.
- Based on described in above-mentioned any one claims can restore funcitons the job practices of superimposed board-like shear wall, it is characterized in that: specifically include following steps:First cast in situ concrete foundation and cast-in-place concrete wall section are together built, pre-embedded steel slab in cast-in-place wall section, default high-strength bolt hole, and the anchored end of unbonded prestressing tendon is imbedded to cast-in-place wall section;By being embedded with the superimposed board-like shear wall pre-erection hoisted in position of steel plate, be placed on spacer pad, adjust verticality and the position of wallboard;Unbonded prestressing tendon is passed to wallboard core space, and fix its position, build core space concrete; External junction steel plate is installed, with three weld all arounds of steel embedded board, fastening by high-strength bolt;Adopting uses the same method carries out the construction of upper floor, and unbonded prestressing tendon, through core space, is strengthened to district's floor levels edge joint position in structural base and all adopted external junction steel plate to be connected with high-strength bolt;Continue the wallboard that a floor above district is strengthened in construction bottom, unbonded prestressing tendon, through core space, is built to core space concrete; After concrete reaches some strength, tensioned prestressing bar;After this construction of each floor is identical with common superimposed sheet shear wall, does not need to arrange unbonded prestressing tendon, and horizontal edge joint position, also without external steel plate is set, adopts vertical plain bars to connect.
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| CN104047378A (en) * | 2014-05-05 | 2014-09-17 | 浙江杭萧钢构股份有限公司 | Steel tube bundle combined structure shear wall field spliced node |
| CN104847033A (en) * | 2015-05-12 | 2015-08-19 | 东南大学 | Viscosity energy consumption self-reset shear wall structure with replaceable bottom |
| CN104878852A (en) * | 2015-05-12 | 2015-09-02 | 东南大学 | Frictional energy dissipation self-centering shear wall structure with easily restored bottom |
| CN104963432A (en) * | 2015-06-17 | 2015-10-07 | 中民筑友有限公司 | Multilayer fabricated concrete wallboard structure system |
| CN105256917A (en) * | 2015-11-18 | 2016-01-20 | 福建工程学院 | Prestressed shear wall and vertical joint combining-connecting structure and construction method thereof |
| CN106836548A (en) * | 2017-03-29 | 2017-06-13 | 河北建筑工程学院 | Precast shear wall insert-type steel board connecting structure and its construction method |
| CN108104308A (en) * | 2017-12-15 | 2018-06-01 | 南京工业大学 | A kind of recoverable multistage energy consumption dry type mixing assembly concrete shear wall |
| CN111335508A (en) * | 2020-01-10 | 2020-06-26 | 中国十七冶集团有限公司 | Built-in prestressed reinforcement's combination formula steel sheet concrete shear force wall |
| CN112627391A (en) * | 2020-12-16 | 2021-04-09 | 河海大学 | Construction process of prefabricated double-steel-plate-concrete combined shear wall |
| CN113818594A (en) * | 2021-09-18 | 2021-12-21 | 同济大学 | Assembling method of low-damage self-resetting shear wall structure |
| CN114150911A (en) * | 2021-12-01 | 2022-03-08 | 福建工程学院 | Design method of replaceable steel connection assembly type shear wall structure |
| CN114856024A (en) * | 2022-04-28 | 2022-08-05 | 成都理工大学 | Novel self-resetting concrete shear wall and construction method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104047378A (en) * | 2014-05-05 | 2014-09-17 | 浙江杭萧钢构股份有限公司 | Steel tube bundle combined structure shear wall field spliced node |
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| CN104878852A (en) * | 2015-05-12 | 2015-09-02 | 东南大学 | Frictional energy dissipation self-centering shear wall structure with easily restored bottom |
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| CN105256917A (en) * | 2015-11-18 | 2016-01-20 | 福建工程学院 | Prestressed shear wall and vertical joint combining-connecting structure and construction method thereof |
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| CN106836548A (en) * | 2017-03-29 | 2017-06-13 | 河北建筑工程学院 | Precast shear wall insert-type steel board connecting structure and its construction method |
| CN108104308A (en) * | 2017-12-15 | 2018-06-01 | 南京工业大学 | A kind of recoverable multistage energy consumption dry type mixing assembly concrete shear wall |
| CN108104308B (en) * | 2017-12-15 | 2023-06-09 | 南京工业大学 | Repairable multistage energy consumption dry-type mixed assembled concrete shear wall |
| CN111335508B (en) * | 2020-01-10 | 2021-07-30 | 中国十七冶集团有限公司 | Built-in prestressed reinforcement's combination formula steel sheet concrete shear force wall |
| CN111335508A (en) * | 2020-01-10 | 2020-06-26 | 中国十七冶集团有限公司 | Built-in prestressed reinforcement's combination formula steel sheet concrete shear force wall |
| CN112627391A (en) * | 2020-12-16 | 2021-04-09 | 河海大学 | Construction process of prefabricated double-steel-plate-concrete combined shear wall |
| CN113818594A (en) * | 2021-09-18 | 2021-12-21 | 同济大学 | Assembling method of low-damage self-resetting shear wall structure |
| CN114150911A (en) * | 2021-12-01 | 2022-03-08 | 福建工程学院 | Design method of replaceable steel connection assembly type shear wall structure |
| CN114856024A (en) * | 2022-04-28 | 2022-08-05 | 成都理工大学 | Novel self-resetting concrete shear wall and construction method and application thereof |
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